Thames Valley Police is appealing for witnesses following a series of robberies in Bletchley.
At around 5pm on Friday 10th September the offender entered Peak Pharmacy, Melrose and threatened members of staff with a screwdriver before making off with money.
On the same day, at around 8pm the suspect has then entered Paddy Power, Queensway.
The suspect approached the counter and demanded money from the till whilst threatening a member of staff with a screwdriver.
The suspect then made off with money.
An hour later the suspect then attempted to get into Ladbrokes, Queesnway but the door was locked.
The offender is described as a white man, around 25-35 years old.
He had dark hair and is of slim build.
The man was wearing a black coat with grey jogging bottoms, a blue surgical mask and black ski glasses.
Investigating officer Detective Constable Sebastian Kuzoe, based at Milton Keynes police station, said: “I am appealing to anyone who witnessed or knows anything about these incidents to please come forward.
“Anyone with information can contact police by making a report online or calling 101.
“Alternatively, if you wish to remain anonymous, you can contact the independent charity Crimestoppers on 0800 555 111 or via their website.”